Geology and geoscience
Learn about Ontario’s geology, the Ontario Geological Survey and access geoscience applications, maps and data.
Ontario Geological Survey
About the Ontario Geological Survey’s (OGS) services, projects and research, the study of the earth and how the OGS helps inform mineral exploration and land use planning.
Geo Labs
Ontario’s Geoscience Laboratories is a full service inorganic geoanalytical facility providing research quality analyses and services.
Summer work experience for geoscience students
Field work opportunities for undergraduate and graduate students with the Ontario Geological Survey.
Northern Ontario GeoTours
Learn about the geological features and rich mining history of Northern Ontario by taking a self-guided GeoTour.
Applications, maps and databases
GeologyOntario
An online database of our publicly available digital data.
OGSEarth
Get geoscience data on mineral exploration activities, bedrock geology, quarternary geology and more.
Indexes of maps
Access Ontario geology maps dating back to 1891 in map format (PDF).
Indexes of publications
Access Ontario geology reports, maps and digital data dating back to 1891 in report format (PDF).
Reports and publications
Publication release notices
Updates on the latest geology maps, reports and digital data published by the Ontario Geological Survey.
Summary of field work and other activities
Read the annual highlights of the Ontario Geological Survey’s mapping and geoscientific research.
Recommendations for exploration
Reports published each year highlighting areas for potential mineral exploration and development.
Mineral exploration activity reports
The latest news on mineral sector activity in Ontario.
Resident geologist report of activities
Read the report published every year highlighting the activities and projects of Ontario’s nine resident geologist districts.
Errata and amendments
Find a list of corrections for released publications.